I built the layout of Mark "purple plexi 800" but I have a problem with the gain.
Let me explain, when I closed the gain throughout the volume is acceptable, but if you increase the gain as a result the volume decreases, and when I opened the completely gain the volume is very low.
The pedal functions as it should if it were not for this inconvenience.
How can I fix?
Thank you! if you need help I can also write voltages of the IC
Go over your board a few times. I'm pretty sure there is a mistake. The only issue you should notice is a bit of noise at the last bit of the gain knob travel to max. That prob can be solved with a inline resistor.
Give a man a match and he'll be warm for a day.
Set a man on fire and he'll be warm for the rest of his life.
In the last piece of the journey gain knob to the maximum, the volume is greatly reduced . the only mistake is this.
There are no " bridges " between the tracks . and the welds are good .
I tried 4 different IC , with the same result
tested and works perfectly now!
When I add the led for 3PDT I should have a difference in the sound right?
I add that I used JRC386D but also try LM386-N1 to figure out which has the best results, but I have to say that JRC is not bad!
No the LED doesn't effect the circuit audibly, it just gives you indication when it's on.
Try a few different ICs and just stick with the one you like best. I find I often have my own favourites and use something different to what was in the original.
I tried LM386N-1 and the sound I like!
I have a problem with the squeel in the last part of the gain, when I have the volume and gain maximum.
If I have the volume at 3 o'clock and the maximum gain, the squeel disappears, reappears as I raise the volume.
In a nutshell I can hold a maximum or gain or volume, but not both.
But I must admit, that perhaps might be normal to have the squell with those extreme settings .....
The JRC does not produce any noise, but seems to have a little less gain and less bass.
Synsound spoke of a series resistor to add.
I could try to solve the problem I have with LM386N-1 well.
If you tell me where it needs to be added and value.